Thermal Stability and Kinetics of Binary Cu65Hf35 Bulk Metallic Glass  

作　　者：单绍泰 夏雷 丁鼎 董远达 

机构地区：[1]Center for Advanced Microanalysis, Shanghai University, Shanghai 200444 [2]Institute of Materials, Shanghai University, Shanghai 200072

出　　处：《Chinese Physics Letters》2006年第11期3101-3104,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 50471099 and 50671058, and the Natural Science Foundation of Shanghai Municipal Science and Technology Commission under Grant No 06ZR14036.

摘　　要：We investigate the thermal stability and kinetics of Cu65Hf35 bulk metallic glass （BMG）. Cu65Hf35 glassy rods in diameter up to 2 mm are prepared by a conventional copper mould suction casting. Kinetics of glass transition and crystallizations are investigated and the ideal glass transition temperature of the alloy is obtained. It is found that the dependence of crystallization temperature of the BMG on the heating rates follows the Vogel-Fhlcher- Tammann （VFT） non-linear relationship rather than the Kissinger and Lasocka linear fittings. The long-term thermal stability of the BMG is investigated by means of continuous crystallization diagrams obtained from the extension of VFT analysis. It is suggested that ideal glass transition and crystallization temperatures can also be regarded as the long-term stability criteria of the BMG.We investigate the thermal stability and kinetics of Cu65Hf35 bulk metallic glass （BMG）. Cu65Hf35 glassy rods in diameter up to 2 mm are prepared by a conventional copper mould suction casting. Kinetics of glass transition and crystallizations are investigated and the ideal glass transition temperature of the alloy is obtained. It is found that the dependence of crystallization temperature of the BMG on the heating rates follows the Vogel-Fhlcher- Tammann （VFT） non-linear relationship rather than the Kissinger and Lasocka linear fittings. The long-term thermal stability of the BMG is investigated by means of continuous crystallization diagrams obtained from the extension of VFT analysis. It is suggested that ideal glass transition and crystallization temperatures can also be regarded as the long-term stability criteria of the BMG.

关 键 词：TRANSITION TEMPERATURE MAGNETIC-PROPERTIES AMORPHOUS-ALLOYS FORMING ALLOY CRYSTALLIZATION 

分 类 号：O743.2[理学—晶体学]